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Finding the Fourth Proportional to 5,814.40, 8,721.12 and 1,917.76

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Solution

The fourth proportional to 5,814.40, 8,721.12 and 1,917.76 is: 2,876.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,814.40 : 8,721.12 = 1,917.76 : x
  2. Step 2: Convert to fraction form
    5,814.40/8,721.12 = 1,917.76/x
  3. Step 3: Cross multiply
    5,814.40x = 8,721.12 × 1,917.76
  4. Step 4: Simplify right side
    5,814.40x = 16,725,015.09
  5. Step 5: Solve for x
    x = 16,725,015.09/5,814.40
  6. Step 6: Final answer
    x = 2,876.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.